private void AcquisitionThread()
{
try
{
Logger.LogInfo("AcquisitionThread is started.");
while (threadActiveSignal)
{
if (this.readCommandEnqueuer == null)
{
string message = $"Read command enqueuer is null.";
Logger.LogError(message);
Thread.Sleep(scadaConfig.Interval);
continue;
}
//MODEL UPDATE -> will swap incoming and current SCADAModel in commit step, so we have to save the reference locally
Dictionary <PointType, Dictionary <ushort, long> > currentAddressToGidMap = scadaModel.CurrentAddressToGidMap;
foreach (PointType pointType in currentAddressToGidMap.Keys)
{
ushort length = 6; //expected by protocol
ushort startAddress = 1;
ushort quantity;
IReadModbusFunction modbusFunction;
ModbusReadCommandParameters mdb_read;
if (pointType == PointType.DIGITAL_OUTPUT)
{
quantity = (ushort)currentAddressToGidMap[PointType.DIGITAL_OUTPUT].Count;
if (quantity == 0)
{
continue;
}
mdb_read = new ModbusReadCommandParameters(length,
(byte)ModbusFunctionCode.READ_COILS,
startAddress,
quantity);
}
//DIGITAL_INPUT
else if (pointType == PointType.DIGITAL_INPUT)
{
quantity = (ushort)currentAddressToGidMap[PointType.DIGITAL_INPUT].Count;
if (quantity == 0)
{
continue;
}
mdb_read = new ModbusReadCommandParameters(length,
(byte)ModbusFunctionCode.READ_DISCRETE_INPUTS,
startAddress,
quantity);
}
//ANALOG_OUTPUT
else if (pointType == PointType.ANALOG_OUTPUT)
{
quantity = (ushort)currentAddressToGidMap[PointType.ANALOG_OUTPUT].Count;
if (quantity == 0)
{
continue;
}
mdb_read = new ModbusReadCommandParameters(length,
(byte)ModbusFunctionCode.READ_HOLDING_REGISTERS,
startAddress,
quantity);
}
//ANALOG_INPUT
else if (pointType == PointType.ANALOG_INPUT)
{
quantity = (ushort)currentAddressToGidMap[PointType.ANALOG_INPUT].Count;
if (quantity == 0)
{
continue;
}
mdb_read = new ModbusReadCommandParameters(length,
(byte)ModbusFunctionCode.READ_INPUT_REGISTERS,
startAddress,
quantity);
}
else if (pointType == PointType.HR_LONG)
{
continue;
}
else
{
mdb_read = null;
modbusFunction = null;
string message = $"PointType:{pointType} value is invalid";
Logger.LogError(message);
continue;
}
modbusFunction = FunctionFactory.CreateReadModbusFunction(mdb_read);
if (this.readCommandEnqueuer.EnqueueReadCommand(modbusFunction))
{
//Logger.LogDebug($"Modbus function enquided. Point type is {pointType}, quantity {quantity}.");
}
}
Thread.Sleep(scadaConfig.Interval);
}
Logger.LogInfo("AcquisitionThread is stopped.");
}
catch (Exception e)
{
string message = "Exception caught in AcquisitionThread.";
Logger.LogError(message, e);
}
}
